TWI641893B - Liquid crystal display apparatus, and polarized light guide plate and the manufacturing method thereof - Google Patents

Abstract

A liquid crystal display device, a polarized light guide plate, and a polarized light guide plate manufacturing method, the liquid crystal display device comprising a liquid crystal panel module and a backlight module having the polarized light guide plate, wherein the polarized light guide plate The substrate includes a substrate, a trench structure, and a metal structure, and wherein the substrate has a first surface, the trench structure is formed on the first surface of the substrate, and the metal structure has a grating-like effect and is formed in the trench On the groove structure.

Description

Liquid crystal display device, polarized light guide plate, and manufacturing method of polarized light guide plate

A liquid crystal display device, a polarized light guide plate, and a method for manufacturing a polarized light guide plate, and more particularly, a polarized light guide plate applied to a backlight module and a method of manufacturing the same, and the liquid crystal display device includes a liquid crystal panel module and a backlight module having the polarized light guide plate.

Generally, a liquid crystal display device includes a liquid crystal panel module and a backlight module. The light guide plate is one of important components of the backlight module, and the main function of the light guide plate is to convert the line light source into a surface light source and change the light. The direction of the illumination. Please refer to FIG. 1 , which is a partial structural diagram of a backlight module of the prior art. As shown in the figure, the light source 10 emits light into the light guide plate 11 of the prior art, and the light is totally reflected by the material of the light guide plate 11, wherein the light guide plate 11 has a second surface 11b facing the reflection sheet 12 The microstructure is such that the light is emitted from the first surface 11a of the second surface 11b due to the destruction of the condition of total reflection of the incident light. In the light guide plate 11 of the prior art, the light emitted from the first surface 11a The polarity is not modulated, resulting in inefficient use of the light provided by the backlight module by the liquid crystal panel module.

Therefore, how to provide a liquid crystal display device, a polarized light guide plate, and a method for manufacturing a polarized light guide plate which can effectively improve the use efficiency of light has become an urgent problem to be solved in the industry.

In order to solve the problems of the prior art, the main object of the present invention is to provide a liquid crystal display device, a polarized light guide plate, and a method of manufacturing a polarized light guide plate which can effectively improve the efficiency of use of light.

In order to achieve the foregoing and other objects, the polarized light guide plate of the present invention comprises: a substrate having a first surface; a trench structure formed on the first surface of the substrate; and a metal structure having a grating-like effect, Formed on the trench structure.

In one embodiment, the metal structure includes metal fibers and a light transmissive colloid, and the metal fibers are stacked on the surface of the trench structure in the same direction.

In one embodiment, the trench structure has a plurality of peaks, and the distance between two adjacent peaks is equal to or less than 4 microns.

The present invention provides a liquid crystal display device comprising: a liquid crystal panel module; and a backlight module disposed under the liquid crystal panel module; wherein the backlight module comprises the aforementioned polarized light guide plate.

In one embodiment, the first surface of the substrate faces the liquid crystal panel module.

The present invention provides a method for manufacturing a polarized light guide plate, comprising the steps of: providing a substrate, wherein the substrate has a first surface; forming a trench structure on the first surface of the substrate through a hot rolling process; And securing a metal structure to the trench structure.

In one embodiment, the step of forming the trench structure on the first surface of the substrate through the hot rolling process comprises: providing an upper roller and a lower roller, wherein the upper roller surface has a groove transfer And passing the substrate between the upper roller and the lower roller, and heating and pressing the substrate through the upper roller and the lower roller to form the groove structure on the first surface of the substrate.

In one embodiment, the step of fixing the metal structure to the trench structure further comprises the steps of: mixing a metal fiber and a transparent colloid to prepare the metal structure; and coating the metal structure on the trench structure And curing the light-transmitting colloid.

Compared with the prior art, since the polarized light guide plate of the present invention forms a groove structure on the first surface of the substrate, when the light is emitted from the inside of the substrate toward the first surface, the light can be enhanced by the groove structure. The brightness and uniformity, and further forming a metal structure on the trench structure, the metal fibers contained in the metal structure will be stacked in the same direction on the surface of the trench structure, producing a grating-like effect, allowing a certain polarity The light wave passes through the gap between the metal fibers, and when the light wave of the other polarity is irradiated onto the surface of the metal fiber, it will be reflected back into the light guide plate, and the polarity is changed by the light mixing action in the backlight module. The first surface is emitted through the gap between the metal fibers, so that the light use efficiency in the liquid crystal display device can be improved.

The embodiments of the present invention are described below by way of specific examples, and those skilled in the art can readily appreciate the other advantages and advantages of the present invention. The present invention may be embodied or applied in various other specific embodiments, and various modifications and changes can be made without departing from the spirit and scope of the invention.

Please refer to FIG. 2 , which is a schematic structural diagram of a substrate of a polarized light guide plate according to a first embodiment of the present invention. As shown, the polarized light guide plate 2 of the present invention comprises: a substrate 20 having a first surface 20a; and a trench structure 21 formed on the first surface 20a of the substrate 20, for ease of understanding, in the present invention The trench structure 21 in the embodiment is described by taking the V-shaped trench structure 21 as an example, but is not limited thereto. In one embodiment, the substrate 20 and the V-shaped trench structure 21 may be integrally formed, for example, by forming a V-shaped trench structure 21 on the substrate 20 through a hot rolling process or an etching process, on the opposite first surface of the substrate 20. The second surface 20b or other surface of 20a can have a microstructure.

In one embodiment, the light is incident on the substrate 20 of the polarizing light guide plate 2 by the light source, and then emitted from the first surface 20a of the substrate 20. When the light passes through the V-shaped groove structure 21 of the first surface 20a, the light is increased. The brightness and uniformity of the emitted light can improve the efficiency of use of the light provided by the liquid crystal panel module to the backlight module.

Please refer to FIG. 3 , which is a schematic structural diagram of a polarized light guide plate according to a second embodiment of the present invention. As shown, the polarized light guide plate 2 may include a metal structure 30 that is fixed to the V-shaped groove structure 21.

In one embodiment, the metal structure 30 may include metal fibers 300 and a light transmissive gel (not shown), and the metal fibers 300 are stacked on the surface of the V-groove structure 21 in the same direction. For example, the metal structure 30 may be formed by mixing and coating the metal fiber 300 and the light-transmitting colloid on the V-shaped groove structure 21, and the metal fibers 300 mixed in the light-transmitting colloid are stacked in the same direction according to their physical properties. On the surface of the groove structure 21, the extending direction of the metal fiber 300 is parallel to the extending direction of the groove of the V-shaped groove structure 21, and the metal fiber 300 is substantially aligned on the surface of the V-shaped groove structure 21, Since the gap between the metal fibers 300 is very small, a grating-like effect is produced, allowing light waves of one polarity to pass, and light waves of the other polarity to pass.

In an embodiment, the V-shaped trench structure 21 may have a plurality of peaks 210, and the distance d between two adjacent peaks 210 is equal to or less than 4 micrometers (μm). Under this condition, the metal fiber 300 will be easier. The physical properties are stacked on the surface of the V-shaped trench structure 21 in the same direction. If the distance d between the two adjacent peaks 210 is greater than 4 micrometers, the metal fibers 300 will be more difficult to be aligned due to their physical properties.

In an embodiment, the light is incident on the substrate 20 of the polarizing light guide plate 2 by the light source, and then emitted from the first surface 20a of the substrate 20, and the light wave passes through the metal fiber deposited on the V-shaped groove structure 21. Diffraction will occur in the gap between 300, and light waves of a certain polarity will pass through the gap between the metal fibers 300, and light waves of the other polarity will not pass through the gap between the metal fibers 300 and be reflected back by the surface of the metal fiber 300. In the substrate 20, through the light mixing action in the backlight module, such as reflection sheet (such as the reflection sheet 12 of FIG. 1) reflection, light mixing, grating modulation, etc., the polarity is changed and then the first surface 20a passes through the metal. The gap between the fibers 300 is emitted, thereby improving the efficiency of use of the light provided by the backlight module by the liquid crystal panel module.

Please refer to FIG. 4 , which is a schematic structural diagram of a liquid crystal display device according to a third embodiment of the present invention. As shown in the figure, the present invention provides a liquid crystal display device 4 including a liquid crystal panel module 40 and a backlight module 41. The backlight module 41 is disposed under the liquid crystal panel module 40. The backlight module 41 includes FIG. The polarized light guide plate 2 described in the embodiment.

In one embodiment, the first surface 20a of the substrate 20 faces the liquid crystal panel module 40.

In one embodiment, since the liquid crystal panel module 40 only uses light of a certain polarity, the light of the other polarity will be shielded and wasted, but the backlight module 41 applies the polarization described in the embodiment of FIG. In the light guide plate 2, the polarity of the light emitted from the backlight module 41 to the liquid crystal panel module 40 has become uniform, so that the light use efficiency in the liquid crystal display device can be improved.

Please refer to FIG. 5, which is a flow chart showing the steps of a method for manufacturing a substrate of a polarized light guide plate according to a fourth embodiment of the present invention. The invention provides a method for manufacturing a substrate of a polarized light guide plate, comprising: step 50, providing a substrate, wherein the substrate has a first surface; and step 51, passing a V-shaped groove structure through a hot rolling process Formed on the first surface of the substrate. This manufacturing method can be used to fabricate the substrate 20 of the polarized light guide plate 2 in the embodiment of FIG. 2.

Please refer to FIG. 6 , which is a flow chart showing the steps of a method for manufacturing a substrate of a polarized light guide plate according to a fifth embodiment of the present invention. In one embodiment, the step 51 of forming a V-shaped trench structure on the first surface of the substrate by a hot rolling process may include step 510 and step 511.

In step 510, an upper roller and a lower roller are provided, wherein the upper roller surface has a V-shaped groove transfer structure, for example, the upper roller may have an upper metal plate, and the lower roller may have a lower metal The plate, but not limited thereto, may be other materials that can be used as a transfer mold. The V-groove transfer structure can be formed on the surface of the metal plate above the upper roller, for example, forming a nickel mold.

In step 511, the substrate is passed between the upper roller and the lower roller, and the substrate is heated and pressurized through the upper roller and the lower roller to form the V-shaped groove on the first surface of the substrate. Structure, further, the shape of the V-shaped groove structure corresponds to the V-shaped groove transfer structure, and further, a microstructure may be formed on the second surface of the opposite first surface of the substrate through the lower roller. .

Please refer to FIG. 7, which is a flow chart of the steps of the method for manufacturing the polarized light guide plate according to the sixth embodiment of the present invention. In an embodiment, the method for manufacturing the polarized light guide plate further includes steps 70, 71, 72, and 73 to fix the metal structure on the V-shaped groove structure, and the manufacturing method can be used to manufacture the same. The polarized light guide plate 2 in the embodiment of 3.

In the step 70, a metal fiber and a light-transmitting colloid are provided. For example, the light-transmitting gel may be an acrylic glue, but not limited thereto.

In step 71, the metal fiber is mixed with the light-transmitting colloid to prepare the metal structure, and the metal fiber is dispersed in the light-transmitting colloid.

In step 72, a mixture of the metal fiber and the light-transmitting colloid is coated on the V-shaped groove structure, wherein the metal fiber is deposited in the same direction on the surface of the V-shaped groove structure according to its physical properties. on.

In step 73, the light-transmitting colloid is cured, and the metal fiber is also fixed.

In summary, since the polarized light guide plate of the present invention forms a groove structure on the first surface of the substrate, when the light is emitted from the inside of the substrate toward the first surface, the brightness of the light can be improved by the groove structure. And a uniformity, and a metal structure may be further formed on the trench structure, the metal fiber contained in the metal structure will be stacked on the surface of the trench structure in the same direction to produce a grating-like effect, allowing light waves of a certain polarity Passing the gap between the metal fibers, and when the light wave of the other polarity is irradiated onto the surface of the metal fiber, it will be reflected back into the light guide plate, and the polarity is changed by the light mixing action in the backlight module, and then the first surface is changed. The light is emitted from the gap between the metal fibers, so that the light use efficiency in the liquid crystal display device can be improved.

The above embodiments are merely illustrative of the principles and effects of the invention and are not intended to limit the invention. Modifications and variations of the above-described embodiments can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be as set forth in the scope of the claims described below.

10‧‧‧Light source

11‧‧‧Light guide

11a‧‧‧ first surface

11b‧‧‧ second surface

12‧‧‧reflector

2‧‧‧Polarized light guide plate

20‧‧‧Substrate

20a‧‧‧ first surface

20b‧‧‧second surface

21‧‧‧V-shaped groove structure

210‧‧‧ Peak

30‧‧‧Metal structure

300‧‧‧Metal fiber

4‧‧‧Liquid crystal display device

40‧‧‧LCD panel module

41‧‧‧Backlight module

50~51‧‧‧Steps

510~511‧‧‧Steps

70~73‧‧‧ steps

D‧‧‧ spacing

FIG. 1 is a partial structural diagram of a backlight module of the prior art.

2 is a schematic structural view of a substrate of a polarized light guide plate according to a first embodiment of the present invention.

3 is a schematic structural view of a polarized light guide plate according to a second embodiment of the present invention.

4 is a schematic structural view of a liquid crystal display device according to a third embodiment of the present invention.

5 is a flow chart showing the steps of a method of manufacturing a substrate of a polarized light guide plate according to a fourth embodiment of the present invention.

6 is a flow chart showing the steps of a method of manufacturing a substrate of a polarized light guide plate according to a fifth embodiment of the present invention.

Fig. 7 is a flow chart showing the steps of a method of manufacturing a polarized light guide plate according to a sixth embodiment of the present invention.

Claims (7)

A polarized light guide plate comprising: a substrate having a first surface; a trench structure formed on the first surface of the substrate; and a metal structure having a grating-like effect formed on the trench structure, wherein The metal structure includes metal fibers and a light-transmitting colloid, and the metal fibers are stacked on the surface of the trench structure in the same direction. The polarized light guide plate of claim 1, wherein the trench structure has a plurality of peaks, and the distance between two adjacent peaks is equal to or less than 4 micrometers. The polarized light guide plate of claim 2, wherein the trench structure is a V-shaped trench structure. A liquid crystal display device comprising: a liquid crystal panel module; and a backlight module disposed under the liquid crystal panel module; wherein the backlight module comprises the bias described in any one of claims 1 to 3. Polarized light guide plate. The liquid crystal display device of claim 4, wherein the first surface of the substrate faces the liquid crystal panel module. A method for manufacturing a polarized light guide plate, comprising the steps of: providing a substrate, wherein the substrate has a first surface; Forming a trench structure on the first surface of the substrate through a hot rolling process; mixing a metal fiber and a transparent colloid to prepare a metal structure; coating the metal structure on the trench structure; The light transmissive colloid is cured to secure the metal structure to the trench structure. The method for manufacturing a polarized light guide plate according to claim 6, wherein the step of forming the trench structure on the first surface of the substrate through the hot rolling process comprises: providing an upper roller and a roller, wherein the upper roller surface has a groove transfer structure; and the substrate is passed between the upper roller and the lower roller, and the substrate is heated and pressurized through the upper roller and the lower roller to The trench structure is formed on the first surface of the substrate.